So this is a 3 week old picture of my Australorp he/she is 4 weeks this Friday but he/she has changed more than my other two Australorp chicks. Is this a sign of a rooster or a hen that is older or changed more than the rest.
Close up picture
Another picture/angle
This is the another chick...
I got 10 chicks and 3 ducklings on 7/19/2015. Some were 3 days old and others were more like 5 days old so they were in a plastic tub with a red light. Soon I found that the ducks were very warm and the chicks really liked the light. So I separated and moved the light so it wasn't directly on...